Germinación y el crecimiento de plántulas de maíz en laboratorio, invernadero y campo
Loading...
Date
Authors
Bolívar, Carlos Eduardo
Méndez Natera, Rafael
Otahola Gómez, Víctor Alejandro
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Costa Rica
Abstract
El objetivo de este trabajo fue evaluar la germinación de semillas certificadas y de producción local de maíz. Se utilizó un diseño de bloques completos al azar con cuatro repeticiones. Se realizaron dos etapas: la primera bajo condiciones de laboratorio e invernadero en octubre 2003 y la segunda bajo condiciones de campo entre octubre y noviembre 2003. Bajo condiciones de laboratorio no hubo diferencias significativas para los carateres evaluados a ocho días después de la siembra: germinación, peso seco del vástago y de radícula, altura de plántula, número de hojas/plántula y diámetro del tallo. En condiciones de invernadero no hubo diferencias para la germinación a cuatro, ocho y 12 días después de la siembra y resto de los caracteres a excepción de la germinación a 16 días, peso seco del vástago, altura de plántulas a 12 y 16 días, número de hojas a ocho, 12 y 16 días y diámetro del tallo entre los lotes de semillas. Tampoco hubo diferencias significativas para los caracteres evaluados en condiciones de campo. En condiciones de invernadero, los diferentes lotes de semillas certificadas presentaron una alta germinación superando a aquellos de producción artesanal. Bajo condiciones de laboratorio y de campo todos los lotes presentaron una germinación mayor al 90 %, superando el valor establecido por el SENASEM para semilla certificada de maíz (>88 %). Sobresalió Pioneer 3018 (2002) en la mayoría de los caracteres.
The objective of this work was to evaluate seed germination and seedling growth in nine lots of corn seeds, four from certified seeds and five from artisan production. A random complete block design with four replications was used. The experiment was carried out in two stages: first , under laboratory and greenhouse conditions in October 2003. The second was made under field conditions between October and November 2003. Under laboratory conditions, there were not significant differences for any variables evaluated at 8 days after sowing (das): germination, dry shoot and radicle weight, seedling height, number of leaves/seedling and stem diameter. Under greenhouse conditions, there were not differences in germination at 4, 8 and 12 das, and in the rest of variables excepting germination at 16 das, dry shoot weight, seedling height at 12 and 16 das, number of leaves at 8, 12 y 16 das and stem diameter among seed lots. There were not significant differences for all variables evaluated under field conditions. Under greenhouse conditions, certified seeds showed higher germination then seeds from artisan production. Under laboratory and field conditions, all seed lots presented germinations greater than 90 %, surpassing the value established by SENASEM for certified seeds (>88 %). the cv. Pioneer 3018 (2002) was outstanding for most of the characters evaluated.
The objective of this work was to evaluate seed germination and seedling growth in nine lots of corn seeds, four from certified seeds and five from artisan production. A random complete block design with four replications was used. The experiment was carried out in two stages: first , under laboratory and greenhouse conditions in October 2003. The second was made under field conditions between October and November 2003. Under laboratory conditions, there were not significant differences for any variables evaluated at 8 days after sowing (das): germination, dry shoot and radicle weight, seedling height, number of leaves/seedling and stem diameter. Under greenhouse conditions, there were not differences in germination at 4, 8 and 12 das, and in the rest of variables excepting germination at 16 das, dry shoot weight, seedling height at 12 and 16 das, number of leaves at 8, 12 y 16 das and stem diameter among seed lots. There were not significant differences for all variables evaluated under field conditions. Under greenhouse conditions, certified seeds showed higher germination then seeds from artisan production. Under laboratory and field conditions, all seed lots presented germinations greater than 90 %, surpassing the value established by SENASEM for certified seeds (>88 %). the cv. Pioneer 3018 (2002) was outstanding for most of the characters evaluated.
Description
Keywords
Zea mays, porcentaje de germinación, altura, peso de vástago y radícula, Zea mays, seed germination, height, shoot and radicle weight